Textural analysis of extruded materials with rhombohedral structure

A textural analysis of extruded rods of material with tetradymite (Bi₂Te₃) structure is conducted by constructing the distribution of the pole density of the (0001) and (1120) planes. The distribution of the poles of the planes is represented by a solid of revolution, and the pole density, which is a function of the angle () of the deviation of the normals to h_i from the extrusion axis, is determined by the diffraction method of specimen inclination using the diffracted ray intensity. It proves possible to identify textural components, and to determine how many there are and the degree of perfection of this method. A technique is worked out for the quantitative estimate of the average values of the components of the conductivity tensor in the grains, and the contribution of the texture to the macroscopic properties of the material is analyzed. To investigate the thin layers (for example, the layerwise distribution of texture in rods of rectangular cross section) we used the method of inverse pole diagrams, where the probability of coincidence of the h_i plane with the working surface of the specimen is analyzed.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 12, pp. 33–39, December, 1989.